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grond · 07 February 2019, 14:59

BF-instructions are quite handy for some very specific things. Handling planar bitmap graphics, some math functions (mainly BFFFO) and compression and decompression come to my mind. Amiga probably looked at the 020 BFs and thought that they wanted that but found a full 32bit system too expensive. Hence, they invented the blitter...

Unfortunately the BF-instructions are very slow on all 68k processors (except on the AC68080 where most take 1 clock cycle and some 2 clock cycles).

07 February 2019, 14:59	#8
grond Registered User Join Date: Jun 2015 Location: Germany Posts: 1,918	BF-instructions are quite handy for some very specific things. Handling planar bitmap graphics, some math functions (mainly BFFFO) and compression and decompression come to my mind. Amiga probably looked at the 020 BFs and thought that they wanted that but found a full 32bit system too expensive. Hence, they invented the blitter... Unfortunately the BF-instructions are very slow on all 68k processors (except on the AC68080 where most take 1 clock cycle and some 2 clock cycles). Last edited by grond; 07 February 2019 at 15:38.